John weeks



(No Model.) 4

J. WEEKS & H. TRAVER.

HYDRAULIC JACK.

No. 334,20 Patented Jan. 12, 1886.

Imavziar:

1/ AM W W TINTTED STATES PATENT Trice;

JOHN \VEEKS, OF NEW YORK, AND HARRISON TRAVER, OF BROOKLYN, ASSIGNORS TORICHARD DUDGEON, OF OYSTER BAY, N. Y.

HYDRAULIC JACK.

SPECIFICATION forming part of Letters Patent No. 334,206, dated January12, 1886.

Application filed October 2 0. 1885. Serial No. 180,384. I (No model.)

To alt whom it may concern:

Be it known that we, JOHN WVEEKs and HARRISON TRAVER, citizens of theUnited States, and residents, respectively, of New 5 York, in the countyof New York and State of New York, and of Brooklyn, in the county ofKings and State of New York, have invented certain new and usefulImprovements in Hydraulic Jacks, of which the following is to aspecification.

Our invention relates to an improvement in hydraulic jacks; and itconsists in the employment of a suitable locking-pin or other suitabledevice, whereby the packing between I 5 the cylinder or external case ofthe jack and the ram, also its confining-ring, and also the pump-blockand the ram, are, when in place, all confined rigidly together, so thatmovement of these parts relative to each other consequent upon swingingthe load on the head of the jack is impossible.

In the drawing, A is the external case or cylinder of the jack, restingupon a base, A, as .usual.

B is the ram-cylinder, adapted to move up ward and downward within theexternal case, A, as usual.

0 is the pump-block, in which is made the pump-bore O.

D is the piston-rod, having on its end the piston D, which is providedwith its ingressvalve, as usual.

E is a gland supported against upward movement by a shoulder formed onthe ram B.

F is the packing for the piston. (Shown as a U-packing in the drawing.)It will be understood that the upper parts of the apparatus (not shownin the drawing) may be of any suitable construction, and since they formno part of this invention they are not illustrated; nor is the method ofsecuring the desired flows of the liquid explained for the same reason.

F isthe packing between the ram B and the external case, A.

G is the packing-ring, which is screwed in place and firmly held bythreads cut in it, and also on the downwardly-extending end of thepump-block.

H is a ring, which comes immediately in contact with the packing F, andis pressed firmly up against it by the pressure of the packingring G.The packing F is shouldered against the lower end of the ram B and ashoulder formed on the pump-block. The pump-block is fastened to the ramB by screwthreads I I.

K is the lower or egress valve of the pump, provided with a spindle orstem, as usual in such cases.

It will be seen that if the parts were put together as illustrated onthe left side of the drawing-that is to say, the pump simply screwedinto the ram and the packing and the ring F put in their place, and thenthe ring G simply screwed up tightly against themthe friction betweenthe packing F and the side of the external case, A, would be so greatthat the packing-ring G would be apt to be unscrewed in the event ofswiveling a load supported on the head of the jack, and that if thejoint between the pump G and the ram B was not so tight as that betweenthe packing-ring G and the threads on the pump-block which'confine it,then instead of the ring G unscrewing, which would loosen the pack- 7 5ing, the pump-block O itself would be apt to unscrew, and thus allow thegland E to become loose and the packing F likewise. In either event themachine would become disorganized and unfit for use. 3

Our invention therefore consists in the employment of a pin, L, which ispreferably made of steel, and which fits into a hole bored through thering H, through the packing F, and through the joint between thepump-block O and the ram B, being preferably half and half in each. Thelower end of the pin L should preferably be flush with the under side ofthe ring H, so as not to obstruct the smoothbearingoftheringGagainsttheringH. There may be more than one of thesepins L, if desired. By their use it is obvious that the pump cannot moverelative to the ram, nor the packing or the ring H relative to eachother, or to either the pump or the ram, and 5 also that thepacking-ring G cannot be unscrewed by the squeeze of the packing againstthe outer case, because the packing itself is immovablecircumferentially.

It will be understood that we do not limit I00 ourselves to the peculiarcharacter of the devices composing the jack shown in the drawing, theybeing entirely irrelevant to our invention, and, moreover, we do notlimit ourselves to the details of construction shown of those partswhich are relevant to the invention, since it will be obvious to any oneskilled inthe art that these devices may be somewhat changed or otherssubstituted for them,which, however, will be practically the equivalentsthereof, and our invention nevertheless be embodied; and we do not limitour invention to hydraulic jacks, since it is equally applicable toother mechanism embodying substantially the same parts.

Having described our 1nvention,we claim- In a hydraulic jack, thecombination, with the pump 0 and the ram B, of the packing F, the ringH, the pin L, and the packing ring or nut G, said pin passing throughthe packing and the ring H and entering the joint be tween the pump andthe ram, substantially as herein sh own and described,whereby thepacking can be readily applied to the pump and the ram, as set forth,and the several parts prevented from moving relative to each other.Signed at New York, in the county of New York and State of New York,this 19th day of October, A. D. 1885.

JOHN WVEEKS. HARRISON TRAVER. \Vitnesses:

J AM-ES A. OGORMAN, CHARLES B. WEBER.

